The Portable Embosser Format (PEF) is a document type that represents braille pages in digital form, accurately and unambiguously; regardless of language, location, embosser settings, braille code and computer environment. It can be used for braille embossing and archiving anywhere in the world, no matter where nor how it was produced. PEF allows new features to be added, such as ink overlay or tactile graphics, thus enabling a completely automated reproduction of advanced braille books.